The area of study belongs to the higher building of the base of Small Kabylie. It consists of several tectono-lithological units affected by a metamorphism épizonale to mésozonale of low pressure and high temperature. This last estimated at P=4-5 Kbar and T=650-700°C is underlined by the presence of the veins of leucozones and the myrmékite thus near to the field of partial fusion.

The structural draft shows the superposition of schisto-sandy units épizonales on units of higher rank. This area is overcome in its Western and Eastern part by formations of Oligo-Miocène-Kabyle.

The study of the syn-schistous deformation highlights an extensive component at vergency is and of the linéations of stretching of direction E - W (D1) with a virgation towards the NNE. This deformation induces the shape in arc marked by plans of schistosity and foliation resulting from the deformation (D2) due to the accommodation of the total overlapping of the building of Beni-Ferguène towards the NW. Alpine and eo-alpine post-schistous deformations of lower (Pt), at vergency East and South, are

highlighted.